No way. Apple stopping support for security upgrades is the issue requiring a phone to stop being used, by you or the 2nd hand recipient. Same issue for the va

No way. Apple stopping support for security upgrades is the issue requiring a phone to stop being used, by you or the 2nd hand recipient. Same issue for the various android vendors. That sure won't change if your phone uses a little less battery decoding movies and your battery use will still be dominated by screen use.